The most devoted fans caught the early hints that Fred Again.. and Skrillex were going to throw a rave in San Francisco’s Civic Center Plaza last Saturday before it was announced, and they were ready to pounce when they went on sale. 25,000 tickets for the June 1 event sold out just a half hour after they went on sale on May 27.

Actually, the most devoted fans climbed trees in order to catch a glimpse of the action when the DJs took the stage at 6:30 pm—which Fred thought was just wonderful. Skrillex also gave them respect as he asked them to please come down a few minutes later. The longtime friends and collaborators performed a three and a half hour set that included remixes of Taylor Swift, Kendrick Lamar, and Benny Benassi, Skrillex’s jam with Missy Elliott, and his Dog Blood collaboration with Germany’s Boys Noize. They brought out surprise guest Anderson .Paak to debut his brand new duet with Fred. It wasn’t exactly underground in terms of material, but a rave it was nonetheless.

“Sonny and I do not take for granted playing in this absolute madness of a place,” Fred said in between beats.

“This looks like we’re in Dune or something!” Skrillex exclaimed, shortly after mentioning that he grew up in San Francisco, attended West Portal Elementary School, and still considers the city his second home.

“I don’t think we are in San Francisco anymore,” he said. “I think we transported somewhere else!”